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How to Calculate the Time Between Two Dates on Mac

With Dato

  1. Click Dato in the menu bar.
  2. Press C, or open the “…” menu, and choose “Calculators…”.
  3. Click “Interval”.
  4. Choose the dates in “From:” and “To:”. The difference shows below them.
  5. Click “Copy” to copy the result.

The result is in years and days, like “1 year, 60 days”, with the same time in months or weeks below it. So for two dates that are more than a year apart, you do not get one total number of days. Turn on “Exclude weekends” to count only the weekdays, like the working days until a deadline, or “Include end date” to also count the last day. “Show time” adds a time to the two dates, but then the other two options are not available.

The “Add/subtract” tab does the opposite: it gives the date that is some years, months, weeks, days, hours, or minutes after a date, like 90 days from today. Use a negative number, like -10, for a date before it.

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Platform
macOS
Requires
macOS 26 or later
Category
Productivity
Released
July 2019
Privacy
No personal data collected
Family Sharing
Yes
Updated
November 2026
Version
5.8.4
Size
18 MB
Setapp rating
99% positive (878 ratings)

More about Dato

Without an app

Numbers, the spreadsheet app of Apple, has a function for this. In a spreadsheet, click a cell, and type the function with your dates. The end date is first:

=DAYS("12/31/2025", "1/1/2025")

The cell shows 364. Apple’s instructions. The DATEDIF function gives the months or the years between two dates, and NETWORKDAYS gives the working days.

Numbers always gives the total number of days, and it is good when you have many dates. For one quick answer, Dato is faster, as its calculator is one click and one key away.

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